Section 46 (below) of Victoria’s Owners Corporation Act states absolutely clearly that the OC must maintain and repair common property.
Sections 36 to 45 of the Act also state that you have to establish a maintenance plan and then provide the funds to effect the plan.
It’s pretty clear. Your committee (and owners corp) need to survey common property, make a plan then raise the funds – either by levies or loans – to make it happen.
46. Owners corporation to repair and maintain common property
An owners corporation must repair and maintain—
(a) the common property; and
(b) the chattels, fixtures, fittings and services related to the common property or its enjoyment.